我遇到了以下问题。在将资源文件夹中的本地xml文件解析为列表后，我希望将此已解析列表发送到片段，该片段应在列表视图中显示此列表中的特定条目。
解析工作，列表视图有效，但我不确定，如何通过意图捆绑额外发送列表到片段以及如何在片段中获得此意图。
在此示例中，我想将List<RowItem> pois发送到static fragment class RouteItemFragment。错误发生在
pois = getActivity().getIntent().getParcelableArrayListExtra("pois");
消息：
inferred type for type parameter T is not within its bound. should implement android.os.parcelable
有人暗示过我吗？
public class RouteView extends ActionBarActivity implements ActionBar.TabListener {
/**
* The {@link android.support.v4.view.PagerAdapter} that will provide
* fragments for each of the sections. We use a
* {@link FragmentPagerAdapter} derivative, which will keep every
* loaded fragment in memory. If this becomes too memory intensive, it
* may be best to switch to a
* {@link android.support.v4.app.FragmentStatePagerAdapter}.
*
*/
Integer citySave;
Integer routeSave;
String routeTitel;
private static int NUM_ITEMS = 2;
SectionsPagerAdapter mSectionsPagerAdapter;
ListView listView;
List<RowItem> pois;
/**
* The {@link ViewPager} that will host the section contents.
*/
ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_route_view);
Bundle b = getIntent().getExtras();
citySave = b.getInt("stadt");
routeSave = b.getInt("route");
routeTitel = b.getString("titel_route");
b.putString("titel_route",routeTitel);
b.putInt("route", routeSave);
RouteItemFragment fragobj = new RouteItemFragment();
fragobj.setArguments(b);
try {
PoiParser parser = new PoiParser();
pois = parser.parse(getAssets().open("poi_passau1.xml"));
b.putParcelableArrayList("pois", (java.util.ArrayList<? extends android.os.Parcelable>) pois);
} catch (IOException e) {
e.printStackTrace();
}
// Set up the action bar.
final ActionBar actionBar = getSupportActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
// Create the adapter that will return a fragment for each of the three
// primary sections of the activity.
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
// Set up the ViewPager with the sections adapter.
mViewPager = (ViewPager) findViewById(R.id.pager);
mViewPager.setAdapter(mSectionsPagerAdapter);
// When swiping between different sections, select the corresponding
// tab. We can also use ActionBar.Tab#select() to do this if we have
// a reference to the Tab.
mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// For each of the sections in the app, add a tab to the action bar.
for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
// Create a tab with text corresponding to the page title defined by
// the adapter. Also specify this Activity object, which implements
// the TabListener interface, as the callback (listener) for when
// this tab is selected.
actionBar.addTab(
actionBar.newTab()
.setText(mSectionsPagerAdapter.getPageTitle(i))
.setTabListener(this));
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.route_view, menu);
return true;
}
@Override
public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
// When the given tab is selected, switch to the corresponding page in
// the ViewPager.
mViewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
@Override
public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
}
/**
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to
* one of the sections/tabs/pages.
*/
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
// Return a PlaceholderFragment (defined as a static inner class below).
switch (position){
case 0:
return RouteItemFragment.newInstance(position);
case 1:
return MapFragment.newInstance(position);
default:
return PlaceholderFragment.newInstance(position);
}
}
@Override
public int getCount() {
// Show 2 total pages.
return NUM_ITEMS;
}
@Override
public CharSequence getPageTitle(int position) {
Locale l = Locale.getDefault();
switch (position) {
case 0:
return getString(R.string.title_section1).toUpperCase(l);
case 1:
return getString(R.string.title_section2).toUpperCase(l);
}
return null;
}
}
public static class RouteItemFragment extends ListFragment implements AdapterView.OnItemClickListener {
private static final String ARG_SECTION_NUMBER = "section_number";
ListView listView;
List<RowItem> pois;
public static RouteItemFragment newInstance(int sectionNumber) {
RouteItemFragment fragment = new RouteItemFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public RouteItemFragment() {
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
pois = getActivity().getIntent().getParcelableArrayListExtra("pois");
CityListViewAdapter adapter = new CityListViewAdapter(getActivity(), R.layout.row_items, pois);
/**Collections.sort(pois, new Comparator<RowItem>() {
public int compare(RowItem s1, RowItem s2) {
return s1.getID().compareTo(s2.getID());
}
});*/
listView.setAdapter(adapter);
listView.setOnItemClickListener(this);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_route_item, container, false);
TextView textView = (TextView) rootView.findViewById(R.id.textRouteitem);
listView = (ListView) rootView.findViewById(android.R.id.list);
textView.setText(String.format(getResources().getString(R.string.routeViewfragment)) + " "
+ getActivity().getIntent().getStringExtra("titel_route"));
return rootView;
}
@Override
public void onItemClick(AdapterView<?> adapterView, View parent, int position, long l) {
Intent intent = new Intent();
intent.setClass(getActivity(), PoiView.class);
RowItem pois = (RowItem) getListView().getItemAtPosition(position);
Bundle b = new Bundle();
//b.putInt("stadt", cities.getID());
b.putParcelableArrayList("titel_stadt", pois);
intent.putExtras(b);
startActivity(intent);
}
}
public static class MapFragment extends Fragment implements
GooglePlayServicesClient.ConnectionCallbacks,
GooglePlayServicesClient.OnConnectionFailedListener {
private static final String ARG_SECTION_NUMBER = "section_number";
private GoogleMap mMap;
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static MapFragment newInstance(int sectionNumber) {
MapFragment fragment = new MapFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
public void onResume() {
super.onResume();
setUpMapIfNeeded();
}
private void setUpMap() {
mMap.addMarker(new MarkerOptions().position(new LatLng(0, 0)).title("Marker"));
}
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
public MapFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_map, container, false);
setUpMapIfNeeded();
return rootView;
}
@Override
public void onConnected(Bundle bundle) {
}
@Override
public void onDisconnected() {
}
@Override
public void onConnectionFailed(ConnectionResult connectionResult) {
}
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_route_view, container, false);
return rootView;
}
}
public void onBackPressed() {
super.onBackPressed();
Intent intent = new Intent();
intent.setClass(RouteView.this, RouteChooseActivity.class);
Bundle b = new Bundle();
b.putInt("stadt", citySave);
intent.putExtras(b);
startActivity(intent);
finish();
}
public void onPause() {
super.onPause();
Bundle b = new Bundle();
b.putInt("stadt", citySave);
b.putInt("route", routeSave);
b.putString("route_titel",routeTitel);
finish();
}
public void onResume() {
super.onResume();
Bundle b = getIntent().getExtras();
citySave = b.getInt("stadt");
routeSave = b.getInt("route");
routeTitel = b.getString("route_titel");
}
public void onStop() {
super.onStop();
finish();
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()) {
case R.id.action_stadt:
setContentView(R.layout.activity_stadt);
Intent stadt = new Intent(RouteView.this, StadtActivity.class);
startActivity(stadt);
return true;
case R.id.action_route:
setContentView(R.layout.activity_route_choose);
Intent route = new Intent(RouteView.this, RouteChooseActivity.class);
startActivity(route);
return true;
case R.id.action_help:
setContentView(R.layout.activity_help);
Intent help = new Intent(RouteView.this, Help.class);
startActivity(help);
return true;
case R.id.action_exit:
moveTaskToBack(true);
System.exit(0);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
PoiParser：
public class PoiParser {
List<RowItem> pois;
private RowItem poi;
private String text;
public PoiParser() {
pois = new ArrayList<RowItem>();
}
public List<RowItem> getPois() {
return pois;
}
public List<RowItem> parse(InputStream is) {
XmlPullParserFactory factory = null;
XmlPullParser parser = null;
try {
factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
parser = factory.newPullParser();
parser.setInput(is, null);
int eventType = parser.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagname = parser.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tagname.equalsIgnoreCase("poi")) {
poi = new RowItem();
}
break;
case XmlPullParser.TEXT:
text = parser.getText();
break;
case XmlPullParser.END_TAG:
if (tagname.equalsIgnoreCase("poi")) {
pois.add(poi);
} else if (tagname.equalsIgnoreCase("image")) {
poi.setImage(text);
} else if (tagname.equalsIgnoreCase("id")) {
poi.setID(Integer.parseInt(text));
} else if (tagname.equalsIgnoreCase("name")) {
poi.setTitle(text);
} else if (tagname.equalsIgnoreCase("desc")) {
poi.setDesc(text);
} else if (tagname.equalsIgnoreCase("imagedesc")) {
poi.setImageDesc(text);
} else if (tagname.equalsIgnoreCase("infotext")) {
poi.setInfoText(text);
} else if (tagname.equalsIgnoreCase("audio")) {
poi.setAudioPoi(text);
} else if (tagname.equalsIgnoreCase("latitude")) {
poi.setLatitudePoi(Double.parseDouble(text));
} else if (tagname.equalsIgnoreCase("longitude")) {
poi.setLongitudePoi(Double.parseDouble(text));
}
break;
default:
break;
}
eventType = parser.next();
}
} catch (XmlPullParserException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return pois;
}
}
RowItem
public class RowItem extends ArrayList<Parcelable> {
private String Bild;
private String Titel;
private String Desc;
private String imageDesc;
private String infoText;
private String audioPoi;
private int ID;
private double latitudePoi;
private double longitudePoi;
public RowItem() {
this.Bild = Bild;
this.Titel = Titel;
this.Desc = Desc;
this.imageDesc = imageDesc;
this.infoText = infoText;
this.audioPoi = audioPoi;
this.ID = ID;
this.latitudePoi = latitudePoi;
this.longitudePoi = longitudePoi;
}
public int getID() {return ID;}
public void setID(int ID) {this.ID = ID;}
public double getLatitudePoi() {return latitudePoi;}
public void setLatitudePoi(double latitudePoi) {this.latitudePoi = latitudePoi;}
public double getLongitudePoi() {return longitudePoi;}
public void setLongitudePoi(double longitudePoi) {this.longitudePoi = longitudePoi;}
public String getImage() {
return Bild;
}
public void setImage(String imageId) {
this.Bild = imageId;
}
public String getDesc() {
return Desc;
}
public void setDesc(String desc) {
this.Desc = desc;
}
public String getTitle() {
return Titel;
}
public void setTitle(String title) {
this.Titel = title;
}
public String getImageDesc() {return imageDesc;}
public void setImageDesc(String imageDesc){this.imageDesc = imageDesc;}
public String getInfoText() {return infoText;}
public void setInfoText(String infoText) {this.infoText = infoText;}
public String getAudioPoi() {return audioPoi;}
public void setAudioPoi(String audioPoi) {this.audioPoi = audioPoi;}
@Override
public String toString() {
return Titel + "\n" + Desc;
}
}
答案 0 :(得分：1)
您应该为RowItem实现Parcelable接口。 并且还要更改代码
b.putParcelableArrayList("pois", pois);
public class RowItem implements Parcelable {
private String Bild;
private String Titel;
private String Desc;
private String imageDesc;
private String infoText;
private String audioPoi;
private int ID;
private double latitudePoi;
private double longitudePoi;
public RowItem() {
}
public RowItem(Parcel in) {
Bild = in.readString();
Titel = in.readString();
Desc = in.readString();
imageDesc = in.readString();
infoText = in.readString();
audioPoi = in.readString();
ID = in.readInt();
latitudePoi = in.readDouble();
longitudePoi = in.readDouble();
}
public int getID() {return ID;}
public void setID(int ID) {this.ID = ID;}
public double getLatitudePoi() {return latitudePoi;}
public void setLatitudePoi(double latitudePoi) {this.latitudePoi = latitudePoi;}
public double getLongitudePoi() {return longitudePoi;}
public void setLongitudePoi(double longitudePoi) {this.longitudePoi = longitudePoi;}
public String getImage() {
return Bild;
}
public void setImage(String imageId) {
this.Bild = imageId;
}
public String getDesc() {
return Desc;
}
public void setDesc(String desc) {
this.Desc = desc;
}
public String getTitle() {
return Titel;
}
public void setTitle(String title) {
this.Titel = title;
}
public String getImageDesc() {return imageDesc;}
public void setImageDesc(String imageDesc){this.imageDesc = imageDesc;}
public String getInfoText() {return infoText;}
public void setInfoText(String infoText) {this.infoText = infoText;}
public String getAudioPoi() {return audioPoi;}
public void setAudioPoi(String audioPoi) {this.audioPoi = audioPoi;}
@Override
public String toString() {
return Titel + "\n" + Desc;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(Bild);
dest.writeString(Titel);
dest.writeString(Desc);
dest.writeString(imageDesc);
dest.writeString(infoText);
dest.writeString(audioPoi);
dest.writeInt(ID);
dest.writeDouble(latitudePoi);
dest.writeDouble(longitudePoi);
}
@SuppressWarnings("rawtypes")
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public RowItem createFromParcel(Parcel in) {
return new RowItem(in);
}
public RowItem[] newArray(int size) {
return new RowItem[size];
}
};
}